clc
clear all
disp('ABSTRACT')
disp('  To find the average and standard deviation of numbers')
% PURPOSE: Average and standard deviation of numbers
% Chapter 22 - EXERCISE 7
%% INPUTS
disp(' ')
disp('INPUTS')
% x is the row vector of numbers
x   =[1 4 6 8 19];
disp('  The input numbers are:')
disp(x')
%% CODE
% length gives the number of elements in the x vector
n   =length(x);
% Calculating the numerator for the mean
sum3=0;
for i=1:1:n
    sum3=sum3+x(i);
end
% Calculating the average from the formula
avg =sum3/n;
% Standard deviation calculations
% Calculating the numerator of the standard deviation
sum4=0;
for i=1:1:n
    sum4=sum4+(x(i)-avg)^2;
end
% Calculating the standard deviation
stdev=sqrt(sum4/(n-1));
%% OUTPUTS
disp('OUTPUTS')
fprintf('  The average of the numbers is %g\n',avg)
fprintf('  The standard deviation is %g\n\n',stdev)